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【单选题】
福尔马林的主要成分( )
A.
35%-40%乙酸水溶液
B.
35%-40%乙醛水溶液
C.
35%-40%甲醛水溶液
D.
35%-40%甲酸水溶液
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皮皮学刷刷变学霸
举一反三
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【判断题】几何不变且无多余约束的体系其自由度必等于零。
A.
正确
B.
错误
【简答题】A Talk Lecture: Sarah Jones Topic: her experiences in 1. ____________________ Audience: 2. ________________________ Time: 8:00 p.m., 3. ____________________________ Place: 4. ___________________, next...
【简答题】Talk
【简答题】根据标点,用现在进行时态连词成句。 1. he, do, his, homework . 2. they, what, talk, about ? 3. Bob, talk, on, phone, the . 4. Tom, Jim, talk, to, who, and ? 5. What, do, you ?
【判断题】配血合格后,应由医护人员到输血科(血库)取血。
A.
正确
B.
错误
【简答题】改错。 (     ) 1. We are happy family .        ______________ A B   C (     ) 2. They are talk .      ______________ A  B C (     ) 3. My family live in China .    ______________ A   B  C
【简答题】( ) 3 2. He feels lonely because he has no close friends ____. A. to talk B. to talk with C. talking D. talking withA. to talk B. to talk with C. talking D. talking with B. to talk with C. talking D...
【判断题】附着力是汽车所能发挥驱动力的极限。
A.
正确
B.
错误
【单选题】附着力是汽车所能发挥驱动力的极限,而附着力又受到地面附着系数的影响。下列不会影响附着系数的是()。
A.
路面的种类和状况,
B.
车身的形状,
C.
行驶车速
D.
车轮的运动状况,
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